"Whilst I was there [at Speakeasy]," says John, "I built up a really good rapport with lost of record company people and bands and in early 1968, Yes, who used to rehearse there. They asked me to do their demo, so I went to Polydor Studio and did their demonstration disc, which I think was four or five songs, that everyone liked." -- John Anthony, quoted in Christopulos, J., & Smart, P. (2005). "Van der Graaf Generator, The Book: A History of the Band Van der Graaf Generator 1967 to 1978." Phil and Jim Publishers, pp. 30-1

In December 2009, Bonham's auction house in London offered the following items as lot #258. It may be that item #4 is from this date: